Statements (22)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:company
|
| gptkbp:activePeriod |
gptkb:19th_century
early 20th century |
| gptkbp:ceased_operations |
early 20th century
|
| gptkbp:country |
gptkb:United_States
|
| gptkbp:foundedBy |
gptkb:Alvan_Graham_Clark
gptkb:Alvan_Clark gptkb:George_Bassett_Clark |
| gptkbp:industry |
gptkb:optics
|
| gptkbp:location |
gptkb:Cambridge,_Massachusetts
|
| gptkbp:notableAchievement |
built largest refracting telescopes of their time
|
| gptkbp:notableFor |
refracting telescopes
|
| gptkbp:notableWork |
gptkb:Lick_Observatory_refractor
gptkb:United_States_Naval_Observatory_refractor gptkb:Yerkes_Observatory_refractor |
| gptkbp:product |
astronomical instruments
telescope lens |
| gptkbp:bfsParent |
gptkb:Fitz-Clark_Refractor
gptkb:Washburn_Observatory gptkb:6-inch_Clark_refractor |
| gptkbp:bfsLayer |
6
|
| https://www.w3.org/2000/01/rdf-schema#label |
Alvan Clark & Sons
|